1457 Vintage 1941 Radio Craft Library N0. 25 - Home-Made Radio Test Instruments Paperback. This is bound by staples and they are rusting. There is a name in the front cover. Overall in great condition. Please look at the pictures. Always consider offers. This 1941 Radio Craft Library No. 25 titled ?Home-Made Radio Test Instruments? is an essential resource for radio enthusiasts and amateur radio experimenters. Edited by the renowned Hugo Gernsback, it provides step-by-step instructions for building radio test equipment, a critical part of early radio technology. This vintage guide includes detailed diagrams and explanations of test instruments used in the 1940s, offering a unique look into electronics history and the evolution of radio testing. Ideal for collectors of vintage electronics and radio manuals, this book remains a valuable reference for those interested in the history of radio and DIY electronics projects.